PURPOSE: An antibacterial external use skin composition using Dictyopteris pacifica Yendo extract and/or a fraction thereof is provided to enhance antibacterial activity. CONSTITUTION: An antibacterial external use skin composition contains ethanol solution extract of Dictyopteris pacifica Yendo, a hexane fraction thereof, dichloromethane fraction thereof, or an ethyl acetate fraction thereof as an active ingredient. The composition has an antibacterial function against Staphylococcus aureus, Staphyococcus epidermidis, or Propionibacterium acnes. The composition is a cosmetic, cleansing, or pharmaceutical composition.본 발명은 스타필로코쿠스 아우레우스, 스타필로코쿠스 에피더미디스 및/또는 프로피오니박테리움 아크네에 대해 항균 활성을 나타내는 참가시뼈대그물말(DictyopterispacificaYendo) 추출물 및/또는 그 분획물을 이용한 항균성 피부 외용제 조성물을 개시한다.
